bug#42125: Python mode load failing due to some issue with tramp

bug#42125: Python mode load failing due to some issue with tramp

[Eric S. Raymond]

Package: emacs
Version: 26.3

Python mode load is failing due to some issue with tramp.  Likely a
loaddefs issue or something similar.  To reproduce, simply visit
a file with a .py extension.

Stack trace:

Debugger entered--Lisp error: (void-variable tramp-default-user-alist)
  (member x tramp-default-user-alist)
  (if (member x tramp-default-user-alist) tramp-default-user-alist (setq tramp-default-user-alist (cons x tramp-default-user-alist)))
  (let* ((x (cons (concat "\\`" (regexp-opt (quote ("su" "sudo" "doas" "ksu"))) "\\'") (quote (nil "root"))))) (if (member x tramp-default-user-alist) tramp-default-user-alist (setq tramp-default-user-alist (cons x tramp-default-user-alist))))
  eval-buffer(#<buffer  *load*-849947> nil "/usr/share/emacs/26.3/lisp/net/tramp-sh.el" nil t)  ; Reading at buffer position 15068
  load-with-code-conversion("/usr/share/emacs/26.3/lisp/net/tramp-sh.el" "/usr/share/emacs/26.3/lisp/net/tramp-sh.el" nil t)
  require(tramp-sh)
  eval-buffer(#<buffer  *load*> nil "/usr/share/emacs/26.3/lisp/progmodes/python.el" nil t)  ; Reading at buffer position 12340
  load-with-code-conversion("/usr/share/emacs/26.3/lisp/progmodes/python.el" "/usr/share/emacs/26.3/lisp/progmodes/python.el" nil t)
  python-mode()
  set-auto-mode-0(python-mode nil)
  set-auto-mode()
  normal-mode(t)
  after-find-file(nil t)
  find-file-noselect-1(#<buffer irkerhook.py> "~/WWW/irker/irkerhook.py" nil nil "~/public_html/irker/irkerhook.py" (5771543 66307))
  find-file-noselect("~/WWW/irker/irkerhook.py" nil nil t)
  find-file("~/WWW/irker/irkerhook.py" t)
  funcall-interactively(find-file "~/WWW/irker/irkerhook.py" t)
  call-interactively(find-file nil nil)
  command-execute(find-file)

There's a workaround: deleting (require 'tramp-sh) from early in
python.el. Of course this disables some remote features.
-- 
		<a href="http://www.catb.org/~esr/">Eric S. Raymond</a>

"They that can give up essential liberty to obtain a little temporary 
safety deserve neither liberty nor safety."
	-- Benjamin Franklin, Historical Review of Pennsylvania, 1759.

bug#42125: Python mode load failing due to some issue with tramp

[Eli Zaretskii]

> From: esr@thyrsus.com (Eric S. Raymond)
> Date: Mon, 29 Jun 2020 10:48:17 -0400 (EDT)
> 
> Package: emacs
> Version: 26.3
> 
> Python mode load is failing due to some issue with tramp.  Likely a
> loaddefs issue or something similar.  To reproduce, simply visit
> a file with a .py extension.
> 
> Stack trace:
> 
> Debugger entered--Lisp error: (void-variable tramp-default-user-alist)
>   (member x tramp-default-user-alist)

I cannot reproduce this, FWIW.  Is it possible that some file in your
~/.emacs.d directory (or some other init-related feature) gets in the
way?

P.S.  Did you try this in "emacs -Q"?

bug#42125: Python mode load failing due to some issue with tramp

[Stefan Kangas]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: esr@thyrsus.com (Eric S. Raymond)
>> Date: Mon, 29 Jun 2020 10:48:17 -0400 (EDT)
>>
>> Package: emacs
>> Version: 26.3
>>
>> Python mode load is failing due to some issue with tramp.  Likely a
>> loaddefs issue or something similar.  To reproduce, simply visit
>> a file with a .py extension.
>>
>> Stack trace:
>>
>> Debugger entered--Lisp error: (void-variable tramp-default-user-alist)
>>   (member x tramp-default-user-alist)
>
> I cannot reproduce this, FWIW.  Is it possible that some file in your
> ~/.emacs.d directory (or some other init-related feature) gets in the
> way?
>
> P.S.  Did you try this in "emacs -Q"?

More information was requested, but none was given within 15 weeks, so
I'm closing this bug.

If this is still an issue, please reply to this email (use "Reply to
all" in your email client) and we can reopen the bug report.